Ah, well worth the effort searching Andy
I'm fortunate in that 'my' 1958 E1A Major had been used on the family smallholding since I was 9 or 10, there had been a Standard on steels (which I just remember) before I was outshopped (a week or so before the Major - me 11/4/58, the youngest casting code being the engine block at 14/4/58 and registered April, original log book AWOL so day and previous owners unknown) opinion varies as to the relative conditions of each of us
Between these two was an early, non electric, non hydraulic TVO E27N which was a bitch to start cold, a bitch to start warm and a bitch to start hot, I remember the wrenched fingers and thumbs or backfired knuckles with the accompanying, jeering puffs of white TVO vapour (no matter how much you drained the carb) and not being able to steer it out of the furrow, along with the igominy of trying to extract it and trailing plough when tugging the trip cord failed to lift the plough bodies out of the ground before hitting the treeline

. Winter 1963 is well remembered as the ice on the pond was thick enough for Dad to drive over it on the E27N with spud wheels on, to get to a bit usually so wet that man nor beast let alone a tractor could navivgate it, trees which snapped off at, rather than being pulled out by. the root were a novelty not seen before and yes it died mid pond, no, brother nor I would slither out to crank it, so an angry Polish person descended from the seat and gingerly made his way to the front, cranked it like it was a Merlin and for what may well have been the only time in its diagreeable life the old bitch started to order first time! As its work was split between ploughing and cultivating the cleared land for Xmas tree planting and clearing what had been untouched since clearfelled for WW1. It escaped cultivation in both wars by being part wet heath and part bog, the wet heath being patchy and underlain by iron pan which was what did for the old E27N finally.
Having scratched away at the iron pan with trailed implements for a few years on what was notionaly the root and veg area, one evening the foreman from the farm behind turned up with his near brand new Super Major and two share digger, I'll never forget the look on Dads face as, roaring fit to bust and with a real firework display from the plough, the Super tore up lump after lump of iron pan, some as big as a dining table, some a couple of feet thick - it took forever to wheelbarrow the managable sized chunks away to the boggiest bits of trackways to infill and excepting one really wet bit he and us subsequently never managed to break through (and is a tractor trap to this day), the rest finally drained.
Anyhow the upshot was going to view a new light blue diesel thing which appeared on a lorry just as I got back from scheool one day, there was a flurry of activity as the old belt pulley was swapped for the new tractors blanking plate and after removal of its rubber bulb horn, the hated E27N departed forever (I do hope she was scrapped, I'd hate to think of anyone else being forced to work with that brute) and YPW 688 became a much loved part of the fabric of our lives. The trailing plough soon went as a 3 furrow cut down to 2 Ransomes joined the Major, trailed cultivator was not replaced for a while and the only bit of E27N going down to that place where bad tractors and good steam loco's were melted down into razor blades I regretted, was the diesel tank being installed eliminating fortnightly trips over to Great Uncles garage at Coltishall to collect 6 square pyramidal topped 5 gallon drums of TVO and returning the empties in a trailer made by Dad and said Uncle from the front axle of an Austin 7 and pulled by an Austin 7 (which was soon to be replaced by a Morris 1000 Traveller) I have just passed the trailer on to an Austin enthusiast as I have neither use nor covered storage for it - amongst plenty else it carried the raw materials for the bungalow Dad built.
Dad has been gone a few years now, Mum is in a care home but I've been trying to keep the place under control in case she decides to come home some day. Many of the Xnas Spruce I recall planting in my early childhood (Dad dug the holes I planted the seedlings) are now life expired and many of the then hardwood saplings which survived 'the firewood treatment' have matured into nice trees, don't think we'll be able to hang on to it for much longer then the the Major will move from part to fully retired to the Bogside home for incurably beloved machinery, where a remnant of the E27N already lives, having for many years acted as spark plug tester the original Magneto sits on a shelf, sometimes I hit its venerable old carcase with a small hammer in recollection of the times it and its pile of associated scrap made my life a misery! Strangely I have no outstanding memories, good, bad, funny or sad, of its successor - like death and taxes she has always been there and done her job quietly without fuss or incident - I guess I owe her a trip to the records office to see if I can fill in her early history like you.